We discussed this when the Barca conference was announced, and if memory serves, there are six possible patients which the paper might discuss. I think there was positive data about three or four of them, meaning that would be the most that could have survived.
If you want a more definite response, you can go back through my posts, or I can. I think MGK found earlier reference to the six, and the 3-4, so you can look at his posts too -- not so many of them on this board.